Re: Machine epsilon: conclusion

jacob navia said:

Richard Heathfield wrote:
jacob navia said:

<snip>

For the different representations we have in the standard header
<float.h>:

#define FLT_EPSILON 1.19209290e-07F // float
#define DBL_EPSILON 2.2204460492503131e-16 // double
#define LDBL_EPSILON 1.084202172485504434007452e-19L //long double
// qfloat epsilon truncated so that it fits in this page...
#define QFLT_EPSILON 1.09003771904865842969737513593110651 ... E-106

You have the same bug as last time. No standard-conforming
implementation may define QFLT_EPSILON in the standard header
<float.h>, as I pointed out to you earlier this week.


I have told you thousand times that this can be disabled
by using -ansic.

You don't seem to understand my point, which is that you are describing
<float.h> as a *standard header*, and yet you *also* describe it as
containing QFLT_EPSILON. It can't *both* be a standard header *and*
contain QFLT_EPSILON at the same time. If it is a standard header, it
does not contain QFLT_EPSILON. If it contains QFLT_EPSILON, it is not a
standard header. Your claim that QFLT_EPSILON is in a standard header
is simply wrong, switch or no switch.

--
Richard Heathfield <http://www.cpax.org.uk>
Email: -www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999
.

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